1620126004 has 36 divisors (see below), whose sum is σ = 3303705636. Its totient is φ = 693162624.

The previous prime is 1620125989. The next prime is 1620126059. The reversal of 1620126004 is 4006210261.

It can be written as a sum of positive squares in 2 ways, for example, as 50381604 + 1569744400 = 7098^2 + 39620^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114234 + ... + 127630.

It is an arithmetic number, because the mean of its divisors is an integer number (91769601).

Almost surely, 2^1620126004 is an apocalyptic number.

1620126004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1620126004 is an abundant number, since it is smaller than the sum of its proper divisors (1683579632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1620126004 is a wasteful number, since it uses less digits than its factorization.

1620126004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14032 (or 14023 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1620126004 is about 40250.7888618347. The cubic root of 1620126004 is about 1174.4907414984.

Adding to 1620126004 its reverse (4006210261), we get a palindrome (5626336265).

The spelling of 1620126004 in words is "one billion, six hundred twenty million, one hundred twenty-six thousand, four".